<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      const users = `
        [
          {
            "name": "jack",
            "age": 20,
            "birth": "2001-12-06",
            "allow": true
          },
          {
            "name": "lili",
            "age": 22,
            "birth": "2001-10-06",
            "allow": true
          },
          {
            "name": "lucy",
            "age": 21,
            "birth": "2001-12-08",
            "allow": false
          }
        ]
    `;
      const r = JSON.parse(users, function (k, v) {
        switch (true) {
          case k === "age":
            return v + "岁";
          case k === "birth":
            return new Date(v);
          default:
            return v;
        }
      });
      console.log(r);
    </script>
  </body>
</html>
